[PATCH AUTOSEL 6.11 077/244] x86/bugs: Add missing NO_SSB flag

Sasha Levin
2024-09-25T11:39:46Z

From: Daniel Sneddon <daniel.sneddon@linux.intel.com>

[ Upstream commit 23e12b54acf621f4f03381dca91cc5f1334f21fd ]

The Moorefield and Lightning Mountain Atom processors are
missing the NO_SSB flag in the vulnerabilities whitelist.
This will cause unaffected parts to incorrectly be reported
as vulnerable. Add the missing flag.

These parts are currently out of service and were verified
internally with archived documentation that they need the
NO_SSB flag.

Closes: https://lore.kernel.org/lkml/CAEJ9NQdhh+4GxrtG1DuYgqYhvc0hi-sKZh-2niukJ-MyFLntAA@mail.gmail.com/
Reported-by: Shanavas.K.S <shanavasks@gmail.com>
Signed-off-by: Daniel Sneddon <daniel.sneddon@linux.intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240829192437.4074196-1-daniel.sneddon@linux.intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/x86/kernel/cpu/common.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index d4e539d4e158c..be307c9ef263d 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1165,8 +1165,8 @@ static const __initconst struct x86_cpu_id cpu_vuln_whitelist[] = {

VULNWL_INTEL(INTEL_CORE_YONAH, NO_SSB),

- VULNWL_INTEL(INTEL_ATOM_AIRMONT_MID, NO_L1TF | MSBDS_ONLY | NO_SWAPGS | NO_ITLB_MULTIHIT),
- VULNWL_INTEL(INTEL_ATOM_AIRMONT_NP, NO_L1TF | NO_SWAPGS | NO_ITLB_MULTIHIT),
+ VULNWL_INTEL(INTEL_ATOM_AIRMONT_MID, NO_SSB | NO_L1TF | NO_SWAPGS | NO_ITLB_MULTIHIT | MSBDS_ONLY),
+ VULNWL_INTEL(INTEL_ATOM_AIRMONT_NP, NO_SSB | NO_L1TF | NO_SWAPGS | NO_ITLB_MULTIHIT),

VULNWL_INTEL(INTEL_ATOM_GOLDMONT, NO_MDS | NO_L1TF | NO_SWAPGS | NO_ITLB_MULTIHIT | NO_MMIO),
VULNWL_INTEL(INTEL_ATOM_GOLDMONT_D, NO_MDS | NO_L1TF | NO_SWAPGS | NO_ITLB_MULTIHIT | NO_MMIO),
--
2.43.0